<template>
<el-container class="home-container">
    <!-- 头部区域 -->
  <el-header>
      <div>
          <img src="../assets/heima.png" alt="">
          <span>电商后台管理系统</span>
      </div>
       <el-button type="info" @click="logout">退出</el-button>
    </el-header>
  <!-- 页面主体区 -->
  <el-container>
      <!-- 右边侧边栏 -->
    <el-aside :width="isCollapse ? '64px': '200px'">
        <!-- 侧边栏菜单区域 -->
         <el-menu
            background-color="#333744"
            text-color="#fff"
            active-text-color="#409eff"
            :unique-opened="true"
            :collapse="isCollapse"
            :collapse-transition="false"
            :router="true"
            :default-active="activePath"
            >
            <div class="toggle-button" @click="toggleCollpase"> ||| </div>
            <!-- 一级菜单 -->
            <el-submenu :index="item.id+''" v-for="(item) in menuList" :key="item.id">
                <!-- 一级菜单模板区域 -->
                <template slot="title">
                    <!-- 图标 -->
                    <i :class="iconsObj[item.id]"></i>
                    <!-- 文本 -->
                    <span>{{ item.authName }}</span>
                </template>
                <!-- 二级菜单 -->
                 <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children"
                    :key="subItem.id"
                    @click="saveNavState('/'+subItem.path)"
                    >
                     <template slot="title">
                        <!-- 图标 -->
                        <i class="el-icon-menu"></i>
                        <!-- 文本 -->
                        <span>{{ subItem.authName }}</span>
                    </template>
                 </el-menu-item>
            </el-submenu>
        </el-menu>
    </el-aside>
    <!-- 右侧内容区域 -->
    <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>
<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menuList: [],
      iconsObj: {
        // 一级菜单的icon图标
        147: 'el-icon-magic-stick',
        125: 'iconfont icon-users',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 是否折叠属性
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.success(res.meta.msg)

      this.menuList = res.data
    },
    // 点击按钮，切换菜单的折叠和打开
    toggleCollpase() {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接激活状态
    saveNavState(activePath) {
      sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>
<style lang="less" scoped>
    .home-container {
        height: 100%;
    }
    .el-header {
        background-color: #373d3f;
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding-left: 0;
        font-size: 20px;
        color: #fff;
        > div {
            display: flex;
            align-items: center;
            span {
                margin-left: 15px;
            }
        }
    }
    .el-aside {
        background-color: #333744;
        .el-menu {
            border-right: none;
        }
    }
    .el-main {
        background-color: #eaedf1;
    }
    .iconfont {
        padding-right: 10px;
    }
    .toggle-button {
        background-color: #4a5064;
        text-align: center;
        line-height: 24px;
        letter-spacing: 0.2em;
        color: #fff;
        font-size: 10px;
    }
</style>
